420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21
4
Table of Contents
Part 1 - General Safety Information
5
A. Operation and Installation Warnings
5
B. Improper Combustion
6
C. Gas
6
D. When Servicing the Boiler
6
E. Boiler System
7
F. CH and DHW Loop Water Chemistry Requirements
7
G. Freeze Protection
7
H. Water Temperature Adjustment and Scalding
8
I. High Elevation Installations
8
Part 2 - Before You Start
9
A. What’s in the Box
9
B. Optional Equipment
11
Part 3 - Prepare the Boiler for Installation
11
A. Locating the Boiler
11
B. Leveling
12
C. Clearances for Service Access
12
D. Wall Mounting Considerations
13
E. Wall Mounting Instructions
13
1. Mounting to a concrete wall
13
2. Mounting to a Wood Studded Wall
14
F. Residential Garage and Closet Installations
15
G. Exhaust Vent and Intake Pipe
15
1. Direct Vent of Exhaust and Intake
15
2. Power Venting, Indoor Combustion Air in Confined or
Unconfined Space
15
H. Carbon Monoxide Detectors
15
I. Prevent Combustion Air Contamination
16
J. Removing a Boiler from a Common Vent System
16
K. Technical Specifications
17
Part 4 - Water Piping
22
A. General Plumbing Information
22
B. Backflow Preventer
22
C. Expansion Tank
22
D. Piping the Boiler
22
E. Internal Circulation Pump
24
F. By-Pass Valve
24
G. CH and DHW Pressure Relief Valves
24
H. Air Elimination Device
26
I. Low Water Cut-Off (Field Supplied)
26
J. Applications*
26
K. Floor Drying Function
33
Part 5 - Venting
34
A. General
34
B. Approved Materials for Exhaust Vent and Intake Pipe
35
C. Additional Requirements for Installation in Canada
35
D. Exhaust Vent and Intake Pipe Location
36
E. Exhaust Vent and Intake Pipe Sizing
37
F. Tightening Boiler Collar to Exhaust Vent and Intake Pipe 37
G. Exhaust Vent and Intake Pipe Installation
38
H. Applications
40
1. Direct Vent Installation of Exhaust and Intake
40
2. Venting Through an Existing System
46
3. Power Venting, Indoor Combustion Air in Confined or Unconfined
Space
47
NOTICE
WARNING
!
The hydronic supply and return connections of these products
are for installation in closed loop systems ONLY! Use of this
product in any manner other than described in this manual may
result in premature product failure, substantial property damage,
severe personal injury, or death. Damage or failure of this product
(or the system in which it is installed) due to unauthorized use IS
NOT COVERED BY WARRANTY.
IMPORTANT
In accordance with Section 325 (f) (3) of the Energy Policy and
Conservation Act, HTP has provided this boiler with multiple
features designed to save energy by reducing the boiler water
temperature as heating load decreases.
These features include:
•
A modulating combustion system that adjusts firing
rate based on heat demand.
•
Adjustment of boiler set point based on inferred heat
load as determined by an outdoor sensor. The outdoor
sensor is supplied with this boiler.
•
This boiler does not include a standing pilot.
•
This boiler is designed and shipped to assure the highest
efficiency operation possible. Such high efficiency is
achieved by limiting heating circuit water temperature
to 140°F when there is no anticipated heat load, based
upon the outdoor sensor and the Outdoor Reset Curve
(sensor response curve) in the boiler software.
•
This feature may be over-ridden as described below in
specific installations:
•
The boiler control is equipped with an outdoor sensor
override for use with building management systems
or in cascaded systems (for systems with total input of
300,000 BTU/hr or greater).
See statement below for an important notice on the use of the
override.
IMPORTANT
In accordance with Section 325 (f) (3) of the Energy Policy
and Conservation Act, this boiler is equipped with a feature
that saves energy by reducing the boiler water temperature
as the heating load decreases. This feature is equipped with
an override which is provided primarily to permit the use of
an external energy management system that serves the same
function. THIS OVERRIDE MUST NOT BE USED UNLESS AT
LEAST ONE OF THE FOLLOWING CONDITIONS IS TRUE:
•
An external energy management system is installed that
reduces the boiler water temperature as the heating
load decreases.
•
This boiler is not used for space heating.
•
This boiler is part of a modular or multiple boiler system
having a total input of 300,000 BTU/hr or greater.
ASME CSD-1, Section CW-400 requires the temperature controls of
hot water heating boilers to
a) be accepted by a nationally recognized testing agency to
conform to UL 353,
b) shutoff the fuel supply when the system water reaches a preset
operating temperature,
c) have a high temperature limit control that prevents the
water temperature from exceeding the maximum allowable
temperature by causing safety shutdown and lockout.
The temperature controls of this boiler have been accepted by a
nationally recognized testing agency to conform to UL 353; they
work to shutoff the fuel supply when the system water temperature
reaches the preset operating temperature; and they cause a safety
shutdown and lockout, requiring a manual reset to start, when the
water temperature reaches 212°F.
